As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE STARTED TO LEAK OIL. FOUND MAGNETO LOOSE TO ENGINE BUT HOLD DOWN BLOCKS WERE TIGHT TO THE ENGINE. THIS CAUSED DAMAGE TO THE MAGETO CASE. MEASURED A NEW GASKET AND ITS THICKNESS IS .034. THE NEW GASKETS, ARE THINNER THAN USED, WAS THE PROBLEM DUE TO THE HOLD DOWN BLOCKS NOT PROVIDING PROPER CLAMPING TENSION.